Lubricating composition.



till

UNITED STATES PATENT OFFICE.

JOSEPH I1. JACKSON AND WILLIAM WRIGHT, OI $HERBROOKE, QUEBEC, CANADA.

I LUIBBICA'IING- COMPOSITION N 0 Drawing.

To all whom it may concern Be it known that We, JOSEPH L. JAonsoN and VVlLLIAM "WRIGHT, citizens of Canada, residing at Sherbrooke, in the Province of Quebec and Dominion of Canada, have in vented new and useful Improvements in Lubricating Compositions, of which the following is a specification.

This invention relates to a lubricating composition designed especially for lubricating differential and transmitting gears, elec tric motor gears, and other like gears running in boxes, and also for lubricating jour nals that are exposed more or less to moisture, the object of the invention being to provide a lubricating composition which will effectually lubricate the parts, prevent the same from heating to an undesirable extent, preserve the metallic surfaces to a high degrec, and protect the parts, whenever exposed, from moisture.

in carrying our invention into practical effect we provide a lubricating composition consisting, essentially, of a semi-solid plastic mixture of asbestos, soap stone, a suitable lubricating oil or grease, and borax, which ingredients are thoroughl combined in a mixing machine. The asb stos is employed in the natural fiber condition, and the ,soap stone and borax in ground or comminuted form. By employing asbestos fiber, instead of ground or comminuted asbestos, the particles of the composition are more thor oughlycombined and maintained in intimate relationship, and provision made for their more uniform distribution to the surfaces to be lubricated. The purpose of the ashestos is to prevent the lubricated surfaces from heating unduly, and this is better effected where the asbestos is used in a fibrous instead of a comminuted condition, and at the same time the asbestos is prevented from working out under compression of the surfaces. The soap stone coiiperates with the asbestos to hold the ingredients commingled, and also gives to the composition the de-' sired body or density. The borax is employed to neutralize any acids which may be present in the oil or grease, and prevents the compound from becoming gummy. It also acts as an agent, in the event that any water should find its way into the bearing, to quickly emulsify or saponify the mixture, thus causing the water to be taken up and transformed into an element of the compound, whereby rusting of the metallic sur- Specification of Letters Patent.

Application filed January 22, 1914. Serial No. 813,789.

Patented May 19, 1914.

faces is prevented. The borax, unlike the sodas commonly employed, further acts as a cleanser and metal preservative, the advantages of which will be appreciated.

It will be observed that the present invention provides a semisolid more or less plastic lubricant, which is adapted to run smoothl and evenly between the surfaces to be. lubrlcated, and that a substantially equal con sistency of the ingredients throughout the mass will be maintained under working ac tion of the moving arts. The composition being devoid of gritty materials, and of a fluid like consistency, it is evident that a substantially uniform consistency or thickness will be preserved, thus preventing the pre cipitation of any solid materials liable to injure or choke up the parts of hearings or the teeth of gears. The use of natural asbestos fiber in this composition is of importance, since the particles of the fiber are matted or intermingled throughout the mass, and therefore serve not only to hold all of the particles combined but to act as a binder and spreader or distributor to convey the lubricant evenly to the surfaces, while at the same time acting as a heat reducing agent and forming a film and thereby preventing the grinding moaning noises of the gears.

In practice, the proportions of the different ingredients may vary, according to the work required. For light work 5% of as bestos may be used in connection with 91-1 of oil or grease, 1% of soap stone, and 2-}% of borax. For heavy work, and for high speed gearing, as high as 50% of asbestos may be employed,,in connection with 10% of soap stone, 39% of oil or grease, and 1% ofborax. The compound may be and preferably is used in. connection with cotton Waste, felt, leather or wool Waste, but may be etficiently employed alone, here a degree of economy is not a primary actor.

We are aware of the fact that the different ingredients of our composition have heretofore been employed in lubricating or similar compositions, but never in conjunction with each other; and we have found that by the use of these ingredients in combination, a lubricating compound is produced which answers all requirements and which is superior to any of the prior compositions with which We are familiar, in lubricating qualities, coherence under all conditions of the ingredients, their cleansing and preservative aclion on tlm inei'allio surfaces, and the protection ix en to such surfaces against; the i lloleforions action of moisture.

We clnin1:

A lubricating composition consisting ossonl iully, of a semi-solid more or less plastic mist [we of the following ingredients, to Wit: asbestos, in the form of natu ill asbestos fiber, from 5 to 50%, ground soapstone from 1 to 10%, oil or grease from about 91;- to 39 1 /2,, and ground borax, from 2. to 1%, the 

